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#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/syscall.h>
struct linux_dirent64 {
uint64_t d_ino;
int64_t d_off;
unsigned short d_reclen;
unsigned char d_type;
char d_name[0];
};
#define BUF_SIZE 4096
int
main(int argc, char *argv[])
{
int fd, nread;
char buf[BUF_SIZE];
struct linux_dirent64 *d;
int bpos;
fd = open(argv[1], O_RDONLY | O_DIRECTORY);
if (fd < 0) {
perror("open");
exit(EXIT_FAILURE);
}
for ( ; ; ) {
nread = syscall(SYS_getdents64, fd, buf, BUF_SIZE);
if (nread == -1) {
perror("getdents");
exit(EXIT_FAILURE);
}
if (nread == 0)
break;
for (bpos = 0; bpos < nread;) {
d = (struct linux_dirent64 *) (buf + bpos);
/*
* Can't use off_t here xfsqa is compiled with
* -D_FILE_OFFSET_BITS=64
*/
if (d->d_off != (long)d->d_off) {
fprintf(stderr, "detected d_off truncation "
"d_name = %s, d_off = %lld\n",
d->d_name, (long long)d->d_off);
exit(EXIT_FAILURE);
}
bpos += d->d_reclen;
}
}
exit(EXIT_SUCCESS);
}
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